SMARCA5 and Miyoshi myopathy: Circ-SMARCA5 relative expression in MM cell lines and normal plasma cells was detected by qPCR, which revealed that Circ-SMARCA5 was downregulated in MM cell lines including NCI-H929 (P < 0.05), RPMI8226 (P < 0.01), U226 (P < 0.05), OPM2 (P < 0.05) and JJN3 (P < 0.01) compared to normal plasma cells (Fig. 2).